Tiny, urgent fix for rebaseline_server to accept new baselines.

(SkipBuildbotRuns)
R=jcgregorio@google.com
TBR=jcgregorio
NOTREECHECKS=True
NOTRY=True
BUG=

Author: epoger@google.com

Review URL: https://codereview.chromium.org/99763007

git-svn-id: http://skia.googlecode.com/svn/trunk@12628 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/rebaseline_server/results.py b/gm/rebaseline_server/results.py
index aa06ec0..6217568 100755
--- a/gm/rebaseline_server/results.py
+++ b/gm/rebaseline_server/results.py
@@ -238,7 +238,7 @@
         if builder.endswith('-Trybot'):
           continue
         per_builder_dict = meta_dict.get(builder)
-        if per_builder_dict:
+        if per_builder_dict is not None:
           fullpath = os.path.join(dirpath, matching_filename)
           gm_json.WriteToFile(per_builder_dict, fullpath)
           actual_builders_written.append(builder)